diff --git a/lib/services/mixins/fusion_wallet_interface.dart b/lib/services/mixins/fusion_wallet_interface.dart
index 9e035204d..053e183b2 100644
--- a/lib/services/mixins/fusion_wallet_interface.dart
+++ b/lib/services/mixins/fusion_wallet_interface.dart
@@ -54,12 +54,12 @@ class FusionInfo {
   }
 
   String toJsonString() {
-    return {
+    return jsonEncode({
       'host': host,
       'port': port,
       'ssl': ssl,
       'rounds': rounds,
-    }.toString();
+    });
   }
 
   @override